Costa Iced Matcha Latte (UK Price & Calories 2026)
Costa’s Iced Matcha Latte swaps the espresso shot for whisked green tea powder, poured over cold semi-skimmed milk and ice for a smooth, gently grassy drink that sits somewhere between a cold brew and a creamy cooler. Across the UK you’ll pay between £4.50 and £5.30 for Small, Medium and Large, with the calories landing anywhere from 84 to 148 kcal depending on the cup. Milk is the one allergen to flag here.
Nutrition, allergen and product details are based on Costa Coffee’s official product information. Prices shown are estimated UK prices and may vary by store, order type and delivery platform. Information last reviewed: 24 July 2026.
| Nutrient | Per 100g (In) | Eat In (360ml) | Takeaway (470ml) |
|---|---|---|---|
| Energy (kcal) | 32 | 114 | 114 |
| Energy (kJ) | 134 | 482 | 482 |
| Carbs (g) | 3.5 | 12.4 | 12.4 |
| Sugars (g) | 3 | 10.9 | 10.9 |
| Fat (g) | 1.1 | 4 | 4 |
| Saturates (g) | 0.7 | 2.5 | 2.5 |
| Protein (g) | 2.4 | 8.7 | 8.7 |
| Salt (g) | 0.07 | 0.25 | 0.25 |
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Green Tea Over Ice: The Short Version
- The Small is the cheapest way in at £4.50; the Large sits at the top of the range at £5.30.
- Calories climb from 84 kcal in the Small to 148 kcal in the Large.
- In kilojoules, that’s 356.8 kJ for the Small rising to 627.2 kJ for the Large.
- Serving sizes run from 345 ml (Small) to 525 ml (Large), so a bigger cup simply means more to drink.
- Every size contains milk — the allergen to keep in mind.
- Switching to oat milk adds 30 kcal; coconut milk trims 32 kcal from the standard cup.
What Each Size Costs You
The Iced Matcha Latte begins at £4.50 for a Small, steps up to £4.90 for a Medium, and finishes at £5.30 for a Large. Paying more buys you more in the cup too, from 345 ml up to 525 ml, stretching the same matcha-and-milk balance across a longer drink. It’s an easy way to match the size to how thirsty you are and what you fancy spending.
What the Nutrition Panel Shows
Most of what’s in the glass comes from the milk rather than the matcha itself. A Small (345 ml) gives you 84 kcal, 8.1 g of sugar and 3 g of fat, of which 1.8 g is saturates. Move up to the Medium and those figures become 114 kcal and 10.9 g sugar; the Large reaches 148 kcal and 14.2 g sugar. Protein rises alongside the size, from 6.4 g up to 11.3 g, thanks to that milk base, and salt stays low throughout, topping out at 0.32 g.
| Size | Portion (ml) | Energy (kcal) | Energy (kJ) | Sugar (g) | Fat (g) | Saturates (g) | Carbs (g) | Protein (g) | Salt (g) |
| Small | 345 | 84 | 356.8 | 8.1 | 3 | 1.8 | 9.2 | 6.4 | 0.18 |
| Medium | 470 | 114 | 482.3 | 10.9 | 4 | 2.5 | 12.4 | 8.7 | 0.25 |
| Large | 525 | 148 | 627.2 | 14.2 | 5.2 | 3.2 | 16.1 | 11.3 | 0.32 |
The Allergen to Know Before Ordering
If you order with allergies in mind, here’s the one to be clear on. Every size of this drink contains:
- Milk: contains
Bear in mind, too, that drinks are made in a shared prep area, so there’s always a chance of cross-contact with other allergens even when they aren’t part of the recipe.
Milk Swaps, Syrups and Add-Ons
Your milk choice shifts the numbers noticeably. Going for oat milk adds 30 kcal and 3 g of fat per standard serving, while bringing the sugar and protein down. Coconut milk goes the other way for energy, cutting 32 kcal and easing off the fat, saturates, sugar and protein. Either swap costs an extra £0.45.
There’s plenty you can add on top, each nudging the price rather than the published nutrition. After more of a kick? An extra espresso shot is £0.80. For texture and sweetness there’s light whip (£0.50), marshmallows (£0.50) or whipped cream (£0.60). Flavoured syrups — caramel, vanilla, hazelnut and a handful of sugar-free options — are £0.60 each, handy if you’d like it closer to a sweeter drink like the Iced Caramel Latte.
A Few Pointers for Your Order
- Want something light? The Small keeps things to 84 kcal without watering down the matcha taste.
- After something more filling? The Large gives you the creamiest, largest pour at 148 kcal.
- Oat milk leans richer and slightly higher in calories; coconut milk is the lighter, lower-sugar route.
- Whipped cream or marshmallows will sweeten things up, just remember each one adds to the bill.
- If you have a milk allergy, check the allergen note above before you order.
Frequently Asked Questions
Disclaimer
Prices shown are typical UK menu estimates for 2026 and may vary by store location, promotions, delivery services, or eat-in vs takeaway pricing. Nutritional values are based on standard drink configurations and may change depending on size, milk choice, extras, or recipe updates made by the brand.